One-Pot Synthesis of 3,5-Disubstituted Isoxazoles from Propargylic Alcohols through Propargylic<i>N</i>-Hydroxylamines
作者:Chada Raji Reddy、Jonnalagadda Vijaykumar、Enukonda Jithender、Gangireddy Pavan Kumar Reddy、René Grée
DOI:10.1002/ejoc.201200628
日期:2012.10
An efficient approach has been described for the synthesis of 3,5-disubstituted isoxazoles from propargylic alcohols. The strategy involves a one-pot p-TSA-catalyzed N-propargylation of protected hydroxylamines followed by a TBAF-mediated detosylative 5-endo-dig cyclization. The method was successfully used for the synthesis of various 3,5-disubstituted isoxazoles.
已经描述了一种从炔丙醇合成 3,5-二取代异恶唑的有效方法。该策略涉及一锅 p-TSA 催化的受保护羟胺的 N-炔丙基化,然后是 TBAF 介导的 5-endo-dig 环化。该方法已成功用于合成各种3,5-二取代异恶唑。